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Video quality control method

A control method and video quality technology, which is applied in the field of streaming media, can solve problems such as untimely adjustment and video quality fluctuations, and achieve the effect of avoiding time-varying effects and poor video playback quality

Inactive Publication Date: 2016-12-07
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems, the present invention provides a video quality control method to overcome the defects in the prior art that video quality level adjustments only based on predicted network bandwidth may lead to untimely adjustment or fluctuations in video quality

Method used

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Examples

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Embodiment Construction

[0017] figure 1 It is a flow chart of Embodiment 1 of the video quality control method of the present invention, and this method can be executed by a relevant video client in the user equipment. Such as figure 1 As shown, the method includes:

[0018] Step 101. Obtain the amount of cached data in the client buffer at the current moment, where the current moment is the moment when the server is requested for the current time slice.

[0019] In the DASH streaming system, the client will buffer a part of the video stream time slice. The difference in the amount of cached data in the buffer will have different effects on the adjustment operation of the time slice quality level. For example, when the amount of cached data in the buffer is too small, you need to be extra cautious if you want to increase the quality level, because once you make a wrong decision to increase the level, it is likely to cause the data in the buffer to be cleared, and then cause the video to freeze . ...

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Abstract

The invention provides a video quality control method. The method comprises the following steps of acquiring a cached data volume in a client buffer area at a current moment; determining whether the size of the cached data volume is between a quality up-regulation threshold tu and a quality down-regulation threshold td; if the size of the cached data volume is between the quality up-regulation threshold tu and the quality down-regulation threshold td, according to a bandwidth corresponding to each received historical time slice, determining a change state of a network bandwidth, according to the change state of the network bandwidth, determining a quality hierarchy of a next time slice, and taking the determined quality hierarchy to request the next time slice from a server. Through the cached data volume in the current buffer area and based on a network bandwidth change condition determined according to the received time slice in a certain time, the quality hierarchy of the next time slice is determined so that a time-varying characteristic influence of the bandwidth change can be effectively avoided and a condition that video play quality is not good because of frequent quality hierarchy adjusting can be avoided too.

Description

technical field [0001] The invention belongs to the technical field of streaming media, and in particular relates to a video quality control method. Background technique [0002] In recent years, the Internet video industry has achieved considerable development, and the traffic of video content has accounted for half of the entire Internet traffic. As a result, users have put forward higher requirements for user experience such as video quality and viewing fluency. However, due to the continuous expansion of the user scale and the diversity and heterogeneity of the network, the current traditional streaming media technology is increasingly unable to meet the viewing needs of users. Under such circumstances, a dynamic adaptive streaming media (Dynamic Adaptive Streaming over HTTP, hereinafter referred to as DASH) technology based on a hypertext transfer protocol (HyperText Transfer Protocol, hereinafter referred to as HTTP) emerges as the times require. DASH transmits media...

Claims

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Application Information

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IPC IPC(8): H04N21/238H04N21/647
Inventor 刘森孟胜彬孙俊郭宗明
Owner PEKING UNIV
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